Sewing-machine.



F. A. PUTNAM 6L L. L. LIVINGSTON.

' SEWING MACHINE.

APPLIoATIoN FILED AUG. 1v, 190s.

970,550. Patented sept. 20,]910.

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'jl j UNITE j maar AVAIIABLE copy- STATES ra'raa'r erica.

"FREDA.`PUTNAM, OF MELROSE, ANI) LLOYD L. LIVINGSTON, OF ABINGTON,MASSA-f .(lHUsETTS, ASSIGNORS T PURITAN MANUFACTURING COMPANY,v OFBOSTON, MAS- SACHUSETTS, A CORPORATION OF MASSACHUSETTS.

sEwxNG-MACHINE.

messe.

To all whom 'it 'may` concern.'

yBe it known that we, Fimo A.. PUTNAM, a citizen of the `United States,residing at Mel rose, county ot' Middlesex, State 'ot' lilassachusetts.and lmovnli. Llvixns'wN, a citizen of the United States, residing atAbington, county ot' Plymouth, and State ot Massa chusetts, haveinvented an Imprtwenuent in 4Sewiiig-Machines, ot' which the followingdescription, in connection with the accompanyingdrawing, is aspecilication; like lelters on the drawing representing like parts.4

lar type of sewing machines, t.

The drawings show one. simple way in which the invention may heincorporated in a sewing machine ot the type above referred to, and`Figure .t is a rear elevation `ot' such i sewing machine. having ourinvention applied thereto; Fig. 2 is a section on the line Fig. 1; Fig.3 is a section on the 1ineg/-y, Fig. t; llig. t is a plan vicw of thecontroller.

The parts which are, old and form no part of our present invention arethe. base l from which extends the overhanging arm 5, the .stitchingmechanism which includes the. needle (not shown) moving verticallythrough the work rest 7. the looper 8, `the presser 'toot (l which israised and lowered automatically by the. roclvsha't't 30. the mainshaft. t) by which these various parts are operated, the clutch fordriving -the main shaft which comprises the clutch member fixed to thcmain shaft and the. coperating clutch member 11 loose thereon` saidlatter clutch member being constantly rotated,

`the clutch-operaiing mechanism which comprises the. clutch-operaiinglever 12 for throwing the clutch members into cngagenient.. which leverispivoted to the trame.

at 13, aud the manual means t'or controlling Specification ofLettex-sPatent. Patented Sgpig, 20, 1910, Application tiled lAugust 17, 1908.Serial No. 448,838.

said lever which comprises an arm 1t rigid with the lever 12 and thelink l5 connected to the arm and extending to a treadle (not shown).lhese parts are such as are commonly lfound in sewing machines of thisclassV and form no part. ol our present in vention, and their operation.therefore, is well known to those skilled in the art and need not bedetailed herein.

ln applying our invention to this type of machine. we have provided acontroller for the clutch-operaiing arm l'lwhich controlle acts to holdthe clutch members l0, 11 in engagement `with each other while thepredetermined nnmhcr ot' stitches is being sewcd. and to permit saidclutch members to be disengaged from each other the instant that saidpredetermined number of stitches has been sewed. lu the presentembodiment ol" our invention this controller is a rotary member mountedon a lixcd stud JS carried in an arm or bracket it .sustained b v theframe, said member being provided with a hub or llange :Ztl that isadapted to engage the end .21 oi the linger 1l of the. clutch-operatinglever. The hub or llange is provided with one or more notches 2:2 of asix/.e to receive the projection 21. Said hub is so situated withreference to the projection 21 that, when the arm 14 is depressed tothrow the clutch members into cngagenutnt, thc projection 21 occupies aposition immediatclv beneath the hub, while when the clutch isdisengaged. as shown in Fig. l, the projection .21 is elevated into oneof the notches, as shown in Fig. Si. '1`he parts are shown in the.drawings in the position they occupy when the machine is at rest. ll'henthe clut'cli-cngaging lever 1:2 is operated b v the treadle to start themachine. the projection Jl is carried out trom the notch 2; and as themachine is .started the hub lll is rotated therebyv bringing the solidpart over the projection 21. and thus holding the lever 1Q in operative'position and the clutch in engagement. 'lhis condition will continneuntil a notch 2'. in the lhub comes opposite the projection 1 when theend 1l ol the. clutch engaging lever will be elcvaled by the springcommonly used lor disengaging the clutch when the ireadle is releasedand the clutch will lic discugagcd, thusl .stopping the machine. 'l`hcnumber otstitchcs which the machine will sus `take before it is stoppeddepends upon the distance between the two notches 22, and this distancecan be made such that the machine will take three, four, tive or anypredetermined number ot' stitches before it is brought to rest.

The hub 2() may be rotated in any suitable way, and by means of anyappropriate mechanism. IVe find it convenient, however, to give thehubits rotary movement from the rockfshat't. 30 by wh ich the presserfootis automatically lifted at each stitch. This rock-shaft is operated fromthe main shaft 9 and oscillates at. the same speed that the main shaftrotates. In .order to utilize the oscillations otA the shaft forrotating` the hub 20, we have made fast to said shaft an arm 3l to whichis pivoted a springpressed pawl 32. the latter migzug'iner ratchet`teeth 33 formed on the hub 30. The pawl is held in engagement. with theratchet teeth by means ot' a spring` 34. lVith this con@ struct-ion thehub 20 will be advanced one step at each oscillation of the shaft 30,and as said shaft 3() oseillates once for each stitch, the said hub 20will move forward one step each time that a stitch is made. The, hubmayhe given its, rotary movement by any other means, however,withoutdeparting from the invention.

Having' described our invention, what we .im as new and desire to secureby vLetters Patent. isz- 1. In a sewing' machine, the combination Withstitching mechanism including a presser foot and a roel; shaft ,foroperating it., a clutch for operating said stitching mechanism.. 'aclutch-operating, lever for throwing the clutch into engagement, andmanual means to operate said lever,o a controller adapted inone positionto engage the lever and thereby hold the clutch in engagement and inanother position to release the lever, and means actuated by the rockshaft to move positively the controller from each position to the otherposition.

2. In a sewing machine, the combination including a lngT mechanism inoperation While it makesv a predetermined number of stitches.

3. In a sewing' machine, the combination with l presser foot and arock-shaft for operating it, a clutch for operating the stitchingmeehanism, and a clutch-operaiing lever, of a rotary controlle' adaptedin one'position to act on the lever to nulintainvthe clutch inengagement. and in another position to release the lever to permittheclutch lto he disengaged, and means connected with said roclc-shali't.for actuatingq said controller.

4. In a sewing machine, the combination with stitching mechanism.including' a presser foot and a rock-shaft for operating it, a clutchfor operating the stitching,T mechstitching mechanism including a`anism, and a lever t'or throwing the clutch into operation, of a rotarycontroller provided with one or more notches, and a. pawl arrie l bysaid rock-shaft. 'For turning said controller, said controller when inone po-. sition acting' to hold the elldeh-o;ierating lever depressedbut permitting said lever to be elevated when the end thereof comesopposite a notch.

In testimony whereof, we have signed our naines to this specification,in the presence of two subscribing witnesses.

. FRED A. PUTNAM.

LLOYD y L. LIVINGSTON.

litnessesrv i Biemans l?. Hausen, FREDERICK S. Gini-animar.

